Improvement in hinges



UNITED STATES PATENT OFFICE.

HENRY I). BRADLEY, OF FORRESTVILLE, CONNECTICUT, :ASSIGNOR TO THEBRISTOL BRASS AND CLOCK COMPANY, OF SAME PLACE. w

IMPROVEMENT IN HlNeEs.

Specification forming part of Letters Patent No. 139,290, dated May 27,1873; application tiled May 9, 1873.

To all whom it may concern:

Be it known that I, HENRY D. BRADLEY, offForrestville, in the county ofHartford and State of Connecticut, have invented certain usefulImprovements in Hinges, of which the following is a specification:

My improved stop-hinge is designed for a lamp-burner hinge, but may beused upon other articles in which stop-hinges are desired. The object ofthe invention is to produce a stop-hinge of superior strength and at asmall cost. In my improved hinge one leaf' is formed `with itsedgecoiled to form the hub, in precisely the same manner as in the ordinaryhinge. The other leaf is slit near one edge,

i and portions of it are swaged in one direction,

and. of a size to receive the pintle, and the remaining portions areswaged in the opposite direction, and are left of such size as to formsockets to receive the coils of the other leaf,

and at the edge the metal is left solid the whole length of the leaf toform 'a stop, as

y 5 and 6 are end views of said hinge.

A designates a leaf of an ordinary hinge, the edge of which is coiled toform the hub a, which hub is cut away at two places in order to receivethe hub of its fellow, and B designates the improved leaf to accompanythe leaf A. I form the leaf B of sheet metal, by'

simultaneously cutting and swaging it in suitable dies, which slit themetalvnear one edge into bands, and also swage two portions or bands, 22, in one direction into a curved form of a size corresponding to thatofthe hub a of the leaf A, and three portions or bands, 3 3 3,

into curved sockets, the interior of which corresponds in size to theexterior of the hub a, and simultaneously with swaging these sockets thewhole edge of the leaf is turned up to form the stop b. The leaf A isthen placed with its hub a resting in the bands or sockf ets 3 3 3, andthe ordinarypintle c, Fig. l, is driven through the hub a and inside ofthe bands 2 2, which holds theleaves together.

Upon opening the hinge the stop b strikes the leaf A, and prevents itfrom beingopened beyond a certain point, as shown in Fig. 6; and as thehub a is embraced by the sockets 3 3 3, any undue strain will simplycause the sockets to close upon the hub still irmer, and thus preventthe coiled hub from straining open, as it does in the ordinary hinge.The leaf B being made of a solid piece, and portions thereof swaged inopposite directions, strain thereon is exerted upon the solid metal,consequently it is not liable. to bend out of place, but will be injuredonly by actually severing the metal. Thus I produce a stophinge ofsuperior strength; and, as only one operation is required to punchtherivet-holes and form the sockets and stop, I am enabled to produce myhinge by very little labor, and therefore at a small cost.

Although I prefer, for light work, to make my hinge of sheet metal, itis evident that, for larger work, a hinge of these-me form may be madeof cast metal. i

I claim as my invention- The improved stop-hinge herein described, y

consisting of the ordinary leaf A, pintle c, and the leaf B, formed withthe sockets 2 2, 3 3 3, and stop I), as and for the purposes set forth.

HENRY D. BRADLEY.

Witnesses: l y l DAN. A. MILLER, ARTHUR C. MILLER.

